Push-Rod Tube Leaks., Is there a trick / technique that works ? Options

[porschetub]

Buy both types of seals. The green ones fit perfectly on one end only.
The black ones fit perfectly on the other end only.
The remaining ones I toss in the trash so I won't use them ever.

Not all 914's use the same seals. Early '70 1.7 uses smaller seals on the inboard or case end of the tube.

Regardless of whohever "FAT Performance" and "European Motor Works" are, (and since I've never heard of them they have no credibility with me (IMG:style_emoticons/default/confused24.gif) ) the best info on our cars comes from those who designed and built them. No sealant is specified to be used on push rod tube seals by the factory. (IMG:style_emoticons/default/beerchug.gif)

do some research then you will know ,Porsche make cock-ups all the time ,time to listen to folks on here,good luck.

[mark04usa]

Regardless of whoever "FAT Performance" and "European Motor Works" are, (and since I've never heard of them they have no credibility with me (IMG:style_emoticons/default/confused24.gif) ) the best info on our cars comes from those who designed and built them. No sealant is specified to be used on push rod tube seals by the factory. (IMG:style_emoticons/default/beerchug.gif)


Porschetub:[/quote]

do some research then you will know ,Porsche make cock-ups all the time ,time to listen to folks on here,good luck.
[/quote]

Porschetub, there is often very useful info on 914World, but there is also often misinformation and differing opinion. I won't be bulleyed into agreeing with you. In this case, I do disagree with those who say we should use RTV or other sealant on push rod tube seals. In my 40+ years of experience with 914's (beginning at a Porsche dealership where I worked and where I bought my 914 in 1976), I have learned a bit about our cars. I do not need to research your favorite shops and their methods, since I do all the maintenence and repair on my car myself, and drive it most every day. Back at ya, Porschetub- YOU should listen to those of us with true experience with these cars, and have a little more respect!

Do you see any oil leaks from these push rod tubes? Not a matter of luck, just proper service (IMG:style_emoticons/default/beer.gif)

[thomasotten]

This was a great thread - and on the eve of the thread's 10th anniversary - I thought it would be fitting to revive it. (IMG:style_emoticons/default/biggrin.gif)

I am interested in the service lifespan of Viton. 10 years or so is what I find for the lifespan. This sounds about right, and with heat cycling under compression, it makes sense that even Viton will deform and harden.


Any new improvements that anyone cares to report? Please, let's hear some reporting.


I found this information from Ray Greenwood over on thesamba, seems to make sense.

Pushrod tube discussion over on theSamba

[Ninja]

There was a thread on o-rings with an X cross section.
I believe the source was McMaster.

That thread had part numbers and was well written.

More difficult to install but...

LOOKED like a possible improvement in my book.

They may have been Viton as well.